Well i have the filler on and it is all blocked out smooth, just have a few spots to fix up. I have sanded through some of the epoxy primer in spots down to bare metal but my real concern is the filler its self. IT is very humid these last few days and it will be almost a week and a half since i started puting filler on in spots and over a week since i last sanded it. Is this going to be a problem? I cant get to spray it for a few more days yet. The exposed metal areas i will just re sand.